602720 ÷ 9 
The aim is to understand the frequency of 9 in 602720.

Step 1:
If we divide 6 by 9, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 9

On to step 2:
The number 9 fits into 60 6 times, leaving a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 6 after subtracting 54 from 60.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 9

Going ahead to step 3:
When dividing 62 by 9, we get 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 66.0
If we subtract 54 from 62, we get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 9

Going ahead to step 4:
When dividing 87 by 9, we get 9 with a remainder of 6.
The next digit of our result is 9. 
Result so far: 669.0
Deduct 81 from 87 and we're left with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 9

On to step 5:
62 divided by 9 is 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 6696.0
The remainder is 8 after subtracting 54 from 62.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 9

On to step 6:
80 divided by 9 is 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 66968.0
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
9 goes into 80 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 66968.8
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
When dividing 80 by 9, we get 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 66968.88
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 66968.88 with a remainder of 0.008.